Kenny said:My riding buddy has an irregular heartbeat. Using his Polar H/R monitor
he discovered that his H/R would spike up during rides when they
shouldn't and not return to normal when they should. He printed out the
H/R stats from his rides and showed them to 3 different cardiologists.
They all took a battery of tests. One even included a 24 hour stay in
hospital hooked up to an EKG the entire time. None of the doctors could
find the problem. But they told him not to worry, just take it easy.
Now on rides whenever he starts getting those abnormal spikes in H/R,
he unfortunately heads for home. Why take chances, eh?
If your buddy hasn't already done so he should seek out an electrophysiologist
(abbrev. EP, a doctor who specializes in the electrical function of the heart)
to evaluate his condition. The EP will probably order up a stress test, a test
that evaluates the heart's electrical function under load, or prescribe a day or
two of wearing a data logger. If the condition is so elusive that it doesn't
show up under these tests, then it's probably not anything he should worry
about.
Irregular heart rhythm that manifests itself as episodes of a few seconds to an
hour or more of unusually high heartrate could be atrial fibrillation, a common
electrical malfunction of the heart. The primary risk of the condition is
stroke or embolism due to a blood clot forming in the heart atria. While the
heart is undergoing an episode of AF, blood isn't being cleared from the atria
and can form clots. The stroke can occur after the heart returns to normal
rhythm and the atria are cleared.
The condition is treatable with mineral supplements, drugs, and/or surgery and
is no reason to curtail reasonable amounts of exercise.
--
Bill Bushnell
http://pobox.com/~bushnell/